Disknode / Problem with setting "Per-user directories"

Hi all,

well, I feel a little dumb about that. I am not quite a greenhorn, but that problem kicks me. Following situation:

• (Testing-)Installation of Drupal 4.7.3 with a few modules, testing purposes, nothing exotic.
• Operating System/Server: Windows Server 2003 64-bit Edition / IIS 6.0 / PHP5.1 / MySQL 4.0.26nt
• DiskNode-Modul installed
• Accessrole "smart content authors" for users being allowed to post smart contents (no pure html/php) with access rights within disknode:
  + create disknode
  + delete files
  + download files
  + edit own disknodes
  + upload files
  - create directory (NOT SET in any role)
  - escape user directory (NOT SET in any role)

Problem:
When I create a disknode with a "smart content author" either as "acting as node" or not, I can upload files to every directory from files on. I can't escape files, but I am not bound to the "per-user directory", it doesn't even exist (after upload).

• When is this directory created? (Tried to create new user, if the directory was created on user-creation, but doesn't seem so)
• Is there a problem with Windows-Servers? (shouldn't)
• How does the per-user directory work?

Well, I didn't look into the code, yet. But I am trying to solve that long enough now by trying different settings and searching the web for similar problems - nothing found so far.

Can anyone help?

so long,
Felix